[fix] Mantis Bug #4266
Set the special to default attack if missing (i.e.
@combat_effects:none)

Change-Id: I871cd1b91b781e084e2c99f0d0877538a981de7b
Merge "[fix] Mantis Bug #4266 Set the special to default attack if missing (i.e. @combat_effects:none)" into unstable